...
-- Looking for pthread.h
-- Looking for pthread.h - not found
CMake Error at /usr/share/cmake-3.16/Modules/FindPackageHandleStandardArgs.cmake:146 (message):
  Could NOT find Threads (missing: Threads_FOUND)
Call Stack (most recent call first):
  /usr/share/cmake-3.16/Modules/FindPackageHandleStandardArgs.cmake:393 (_FPHSA_FAILURE_MESSAGE)
  /usr/share/cmake-3.16/Modules/FindThreads.cmake:220 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  cmake_modules/ThirdpartyToolchain.cmake:1057 (find_package)
  CMakeLists.txt:543 (include)


-- Configuring incomplete, errors occurred!
See also "/build/cpp/CMakeFiles/CMakeOutput.log".
See also "/build/cpp/CMakeFiles/CMakeError.log".
Error: docker run --rm -e SETUPTOOLS_SCM_PRETEND_VERSION=16.0.0.dev470 --shm-size 2147483648 -e ARROW_BUILD_STATIC=OFF -e ARROW_CTEST_TIMEOUT=500 -e ARROW_DATASET=ON -e ARROW_JEMALLOC=OFF -e ARROW_ORC=OFF -e ARROW_S3=OFF -e ARROW_USE_TSAN=ON -e AWS_ACCESS_KEY_ID=*** -e AWS_SECRET_ACCESS_KEY=*** -e CC=clang-11 -e CCACHE_COMPILERCHECK=content -e CCACHE_COMPRESS=1 -e CCACHE_COMPRESSLEVEL=6 -e CCACHE_DIR=/ccache -e CCACHE_MAXSIZE=1G -e CXX=clang++-11 -e GITHUB_ACTIONS=true -e SCCACHE_BUCKET=*** -e SCCACHE_REGION=*** -e SCCACHE_S3_KEY_PREFIX=sccache -v /home/runner/work/crossbow/crossbow/arrow:/arrow -v ubuntu-ccache:/ccache apache/arrow-dev:amd64-ubuntu-20.04-cpp /bin/bash -c   /arrow/ci/scripts/cpp_build.sh /arrow /build &&
  /arrow/ci/scripts/integration_skyhook.sh /build &&
  /arrow/ci/scripts/cpp_test.sh /arrow /build exited with non-zero exit code 1